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cgroup: setup BlockIORead/WriteBandwidth in bus_cgroup_set_property

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This patch adds the support for setting up BlockIORead/WriteBandwidth
in bus_cgroup_set_property.
This commit is contained in:
Gao feng 2013-09-10 17:23:07 +02:00 committed by Lennart Poettering
parent 47c0980d37
commit f004c2ca11
1 changed files with 95 additions and 0 deletions
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95
src/core/dbus-cgroup.c
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@ -222,6 +222,101 @@ int bus_cgroup_set_property(
return 1;
} else if (streq(name, "BlockIOReadBandwidth") || streq(name, "BlockIOWriteBandwidth")) {
DBusMessageIter sub;
unsigned n = 0;
bool read = true;
if (streq(name, "BlockIOWriteBandwidth"))
read = false;
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_ARRAY ||
dbus_message_iter_get_element_type(i) != DBUS_TYPE_STRUCT)
return -EINVAL;
dbus_message_iter_recurse(i, &sub);
while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
DBusMessageIter sub2;
const char *path;
uint64_t u64;
CGroupBlockIODeviceBandwidth *a;
dbus_message_iter_recurse(&sub, &sub2);
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &u64, false) < 0)
return -EINVAL;
if (mode != UNIT_CHECK) {
CGroupBlockIODeviceBandwidth *b;
bool exist = false;
LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) {
if (path_equal(path, b->path) && read == b->read) {
a = b;
exist = true;
break;
}
}
if (!exist) {
a = new0(CGroupBlockIODeviceBandwidth, 1);
if (!a)
return -ENOMEM;
a->read = read;
a->path = strdup(path);
if (!a->path) {
free(a);
return -ENOMEM;
}
}
a->bandwidth = u64;
if (!exist)
LIST_PREPEND(CGroupBlockIODeviceBandwidth, device_bandwidths,
c->blockio_device_bandwidths, a);
}
n++;
dbus_message_iter_next(&sub);
}
if (mode != UNIT_CHECK) {
_cleanup_free_ char *buf = NULL;
_cleanup_fclose_ FILE *f = NULL;
CGroupBlockIODeviceBandwidth *a;
CGroupBlockIODeviceBandwidth *next;
size_t size = 0;
if (n == 0) {
LIST_FOREACH_SAFE(device_bandwidths, a, next, c->blockio_device_bandwidths)
if (a->read == read)
cgroup_context_free_blockio_device_bandwidth(c, a);
}
f = open_memstream(&buf, &size);
if (!f)
return -ENOMEM;
if (read) {
fputs("BlockIOReadBandwidth=\n", f);
LIST_FOREACH(device_bandwidths, a, c->blockio_device_bandwidths)
if (a->read)
fprintf(f, "BlockIOReadBandwidth=%s %" PRIu64 "\n", a->path, a->bandwidth);
} else {
fputs("BlockIOWriteBandwidth=\n", f);
LIST_FOREACH(device_bandwidths, a, c->blockio_device_bandwidths)
if (!a->read)
fprintf(f, "BlockIOWriteBandwidth=%s %" PRIu64 "\n", a->path, a->bandwidth);
}
fflush(f);
unit_write_drop_in_private(u, mode, name, buf);
}
return 1;
} else if (streq(name, "MemoryAccounting")) {
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_BOOLEAN)